Pillbug Lab Report

The purpose of our experiment is to test animal behavior and reactions to a change in environment. Our guiding question is, “Why do living organisms respond to environmental factors?” This is basically a question that is asking why living things will react a certain way to environmental changes. The task to answer this question is to experiment with changing environmental factors with pill bugs.

The lab handout provided by the instructor was used as a guideline to conduct this experiment. The only difference was the organism used and data collection period. For this experiment, pill bugs and crickets were utilized. Also, data was collected for a period of 12 minutes.

The dependent variable is pulsation rates of L. variegatus before and after they were in the treatments. The standardized variable of this experiment would be the temperature of the surroundings of the L. variegatus, the three pulsation rates taken for each worm before and after the treatments, and also the amount of time each worm was kept in their respective treatments. The level of treatment for this experiment would be ten because of the six different concentration treatments of caffeine and nicotine along with the four household drugs. The sample size of the experiment differed from some treatments to other. For the three different concentrations of caffeine and nicotine, the sample size was 18 black worms each. The sample size of the control treatment of week 1 was 6 black worms. 12 black worms were used for the control of week 2, decaffeinated coffee and instant coffee. 11 black worms were used for the tea treatment and 15 were used for the tobacco treatment. There were three replications of the pulsation rate readings per worm before and after the treatment. With all this information we were able to get the results we got.

The first variable tested was phototaxis, the movement toward or away from light. To do this, we used an empty petri dish and filled the bottom of it with filter paper. We then added five sowbugs to the petri dish and placed a lid on top. After leaving the sowbugs alone for three minutes to get acclimated to their new environment, we placed a lamp directly over the petri dish. Then we laid a piece of cardboard over the petri dish to cover exactly half of it, leaving the other half exposed to the lamp. We want the cardboard to cover close to half of it as possible to make the data as accurate as possible. The lamp was then turned on and the number of sowbugs in the light and dark locations were recorded every minute for the next twelve minutes. As shown in Table 1, we determined that sowbugs are effected negatively by phototaxis.

This information would suggest that the sow bugs were not especially interested in food at the time the experiment took place.

The purpose of our experiment was to observe the behavior of the pill bugs. We were trying to find exactly whether the pill bugs would be attracted or repelled by the chemicals. The chemicals used were vinegar, water, salt solution and a sugar

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

The materials needed for the experiment were pennies, cups, water, salt, detergent, measuring spoons, paper towels, eye droppers, data sheet and graduated cylinders. First, one cup was filled with 50 mL of water, and one penny was placed on a paper towel. Then, drops of water were dropped on a penny out of the eyedropper until they spilled over the side. Next, the penny was then wiped off and the data was recorded on the data sheet. the procedures were repeated nine more times for a total of ten times. Finally, these procedures were repeated nine more times. This was repeated with a level teaspoon of salt in 50 mL water. The water was stirred to dissolve the salt. Then, the same trials were repeated with one level teaspoon of liquid Dawn detergent in the 50 mL of water.. The regular water was the control. Water with 1 tsp ofsalt and water with 1 tsp of liquid Dawn detergent.

In our hypothesis we stated that if we have music on one side, and no music on the other, the pill bugs will all attract to the side with no music. A Styrofoam divider was placed into the shoe box, with 5 pillbugs on each side. One side was playing music, and the other side wasn't. This experiment was timed for 10 minutes, after every minute the pill bugs were counted on the side with music, and on the side without. In our experiment the independent variable was the music, our dependent variable was the pillbugs, and our controlled variable was the amount of pillbugs used. The side with the music averaged

To stay consistent with and avoid error, the number of changing variables will be as close to 1 as possible; the only variable being externally manipulated in this experiment would be bean beetle size in two of the populations. (I.E: One group is a random control group of 10 beetles, one group is a variable group with the 10 smallest size beetles, and one groups is a variable group with the 10 largest size beetles.)

2. Place 10 randomly selected sowbugs in each of the 3 empty tin bowls for 3 minutes to allow them to acclimate to the environment.

The purpose of this lab was to save a little gummy worm named Sam from drowning. In addition, one of the labs key terms was a hypothesis which is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. Furthermore, we also learned that an independent variable is a factor that is changed during the experiment. On the other hand, the dependent variable is the factor that is observed or measured during the experiment. To begin with, the experiment the hypothesis formulated was if we reshape the paperclips into hooks and pick up sam, and the lifesaver (without touching them), then the lifesaver would be stretched enough for Sam to go through it.

Then we inverted the tubes so an air bubble would form in the little tube that is now upside-down. Now that we know what to do, we marked the little tube 2/3 full. One tube was filled to that line with glucose solution, another with fructose solution, sucrose solution and the last one with water. Next, the little tubes were topped off with a yeast solution. Then we slide a big tube over the little one and completed the inversion, this is done for every little test tube. After they are all inverted our group measured the bubble present at the top of the little tube. Then we put all of the inverted test tubes into a hot water bath for 20 minutes. After 20 minutes we took the tubes out and measure the air bubbles in the tubes. Next, we recorded the data calculated the net change from the beginning of the experiment to after the hot

The first experiment determines the amount of bacterial colonies found in the creek water sample. The serial dilution method and the pour plate method will be used to minimise that the number of bacterial colonies to gain visible quantitative data. Two types of samples will be conducted for the first. One labelled full strength will contain 1ml of pure creek water and the second, half strength will contain 1ml of a mixture between creek and diluted water. Half strength and full strength refers to the starting amount of bacteria.

Scoops of flour are taken out from the Tribolium casteneum (T. casteneum) and Tribolium confusum (T. confusum) stock containers, and poured onto two pieces of paper separately. Four vials are labeled as 10 T. casteneum, 10 T. confusum, 20 T. casteneum, and 20 T. confusum. The bettles are brushed into the vials according to the number of bettles labeled, and the vitals are sealed with a foam stopper. After that, the start date, initial number and type of beetles are recorded. Each week, the flour from each vial will be poured into a shifter and separated into a petri. The beetles will remain in the sifter. The beetles and larvae will be observed and the numbers of live and dead beetles will be recorded. The live beetles and larvae will then